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you may be getting that raw fuel smell because there is probably not a tight seal somewhere around the down pipes and air is getting in there and the sensor thinks it needs to give more fuel, I had a similiar problem. Once everything was tightened up the smell went away and there were no cats on the car at all, the car idled much smoother too. I was always told by everyone when the car was idling all lumpy that it had to be the Air idle control valve but even after changing that it was still lumpy. My mechanic put the computer on the car and could verify which bank was having the problem and tightened up the down pipe/precat , everything has been great since
:What is the difference in the down pipes performance wise. I know the splits are better for response, but is it noticeable over the jdm dp's? They don't have precats, like the Aspec version, so they flow better, but how much of a step back will I be taking if i switch to them from my current setup of dp's, testpipes, h pipe and exhaust. Reason for switching is the dp's I bought have horrible filament and make the test pipes hang too low. That, and they have a crack somewhere on the drivers side and cause slight noise. I have a set of jdm dp's and am considering using them insted. Also, going to put the cats back b/c of the fuel smell that still exists. Any ideas?
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